*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html,body,#app{
    width: 100%;
    height: 100%;
   
}
ul{
    list-style: none;
}
.box{
    width: 1240px;
    height: 100%;
    margin: auto;
    /* background: orange; */
  }
  ol{
    list-style: none;
}